Expanding Tic-Tac-Toe
Game
A three-round tic-tac-toe game where the board grows from 3×3 to 5×5 to 7×7, old moves stay in play, and key cells become walls after each round.
How it works
Players take turns placing Xs and Os. Round 1 uses a 3×3 grid and requires three in a row. Round 2 expands to a 5×5 grid and requires four in a row. Round 3 expands to a 7×7 grid and requires five in a row.
After each round, the winning line is highlighted. Both ends of the winning line and the loser’s last move become walls for the next round. The remaining marks carry forward, the grid expands around the previous board, and the loser goes first in the next round. The winner is the player with the most round wins after three rounds.
When to use it
- Best used for: A quick two-player strategy game that adds memory, board control, and changing constraints to classic tic-tac-toe.
- Not used for: Serious competition, single-player play, saved games, online multiplayer, or formal game analysis.
- Audience: People looking for a short browser-based game that is easy to learn but less predictable than standard tic-tac-toe.
Notes and limits
- Assumption: Both players share the same device and take turns on the same screen.
- Known constraint: The game does not include artificial intelligence, online play, saved sessions, or player accounts.
- Edge case: A draw still advances the game, but without a winning line to convert into walls.
Disclaimer
This tool is for general information only. It may contain errors or omissions. Use at your own discretion. No liability is accepted for decisions made based on this tool.